 (defmethod compile-term "="
   [[op path value :as term]]
   {:post [(map? %)
-          (:where %)]}
+          (string? (:where %))]}
   (let [count (count term)]
     (if (not= 3 count)
       (throw (IllegalArgumentException.

  "Converts a vector-structured `query` to a corresponding SQL query which will
  return nodes matching the `query`."
  [query]
  {:pre  [(some-fn nil? sequential? query)]
   :post [(vector? %)
          (string? (first %))
          (every? (complement coll?) (rest %))]}

(defmethod compile-term :numeric-comparison
  [[op path value :as term]]
  {:post [(map? %)
          (string? (:where %))]}
  (let [count (count term)]
    (if (not= 3 count)
      (throw (IllegalArgumentException.
